Not Happy with the power. How to increase?
#1
Not Happy with the power. How to increase?
I recently restored my Olds 455 that I put into my 69 Cutlass. I put a .472 Cam and lifter set in, a performer intake, double gear and chain timing set and a 750 CFM carb. Im looking to increase my horse power or tourqe. What can I do? I plan on increasing my exhaust Size in the spring as well as eventually adding posi. Any suggestions?
Here are pics of my car and engine.
http://www.cardomain.com/ride/385541...mobile-cutlass
Here are pics of my car and engine.
http://www.cardomain.com/ride/385541...mobile-cutlass
#2
Very nice!!! I would make sure the secondaries are opening up on your carb, bump the timing as far as you can (34-36 deg all in at 3000 rpm), get your total somewhere around 45 deg with vacuum advance!
What trans and gears are in it now?
What trans and gears are in it now?
#3
I see you got that engine from a '73 Delta. If it's original then you might only have about 8:1 compression. Also i'm wondering about the gearing. A stock '69 'S' typically came with something less than say a 3.08 (2.56 or 2.78 maybe? i'm not a '69 guy so not sure).
#4
I see you got that engine from a '73 Delta. If it's original then you might only have about 8:1 compression. Also i'm wondering about the gearing. A stock '69 'S' typically came with something less than say a 3.08 (2.56 or 2.78 maybe? i'm not a '69 guy so not sure).
Its not even november yet and I cant wait to put it back on the road!
#5
Olds changes CR with the pistons, so that means major teardown. If I changed them I wouldn't go much past 9.5 so as to still be able to run pump gas.
Does this engine still have J heads? If it does they need a good port/polish to get anything remotely resembling high-performance out of them. Bigger valves while you're at it.
You might also look into that timing set. Even good brand names are notorious for coming retarded out of the box. Degreeing that cam might unleash power you didn't know was there.
I'm thinking along Joe's line. Gearing is tall on most Oldsmobiles and even a 455's torque often has trouble overcoming that limitation. Do you have a stall converter? It may not be matched to your cam/intake powerband.
Does this engine still have J heads? If it does they need a good port/polish to get anything remotely resembling high-performance out of them. Bigger valves while you're at it.
You might also look into that timing set. Even good brand names are notorious for coming retarded out of the box. Degreeing that cam might unleash power you didn't know was there.
I'm thinking along Joe's line. Gearing is tall on most Oldsmobiles and even a 455's torque often has trouble overcoming that limitation. Do you have a stall converter? It may not be matched to your cam/intake powerband.
#6
This is not from personal experience, but out of reading many articles.
Anyone on here try out the cloyes?? I want to change my timing set soon-ish. So any input would be great.
-Tony
#8
As mentioned, 73's a low compression engine with not very good flowing heads. Lot's of things you can do, but costs money. I built the 455 in my car from scratch. .030 over 455, TRW pistons and custom ported W-30 heads for 10.25 CR. Adjustable valve train with .560 cam. 700R4 od tranny and 3.73 posi. Thing really moves, but still cruises nicely with the 0.70 od 4th. Generally, lower gearings what you're gonna feel on the street, so important finding this out.
Thread
Thread Starter
Forum
Replies
Last Post
Del70
General Discussion
10
August 23rd, 2017 03:59 AM
navvet
Eighty-Eight
6
January 6th, 2014 03:24 PM